飞机目标动态RCS仿真技术研究

针对飞行器目标在实际飞行过程中由于飞行姿态变化对目标电磁散射截面(radar cross section,RCS)的影响,提出了一种新的动态目标电磁散射建模方法.首先,对飞行器目标精确建模问题,提出了利用激光扫描方法对真实目标进行外形扫描,再通过逆向重构技术得到目标精确几何外形;然后利用实际飞行过程中测试数据,将获取的目标相对于雷达视向角信息代入仿真程序中,使用一体化电磁散射计算软件对一定航路上运动目标进行仿真计算,消除飞行姿态扰动对仿真数据的影响,使动态目标电磁散射建模更加符合实际飞行情况.仿真结果表明,本文方法可快速、准确获取飞机目标动态RCS仿真结果,具有很好的工程应用价值.

A simulation method of aircraft dynamic RCS

In consideration of the influence of moving target to the target radar cross section(RCS), an exact RCS modeling method of moving target based on the measured data is proposed in this paper. Firstly, we use laser scanning method to build the precise geometric model of the real target. Secondly, we extract the parameters of the target motion characteristics in the actual flight and use the attitude angle in simulated program. Finally, we develop integration software to calculate the electromagnetic scattering, and eliminate the effect of attitude angle variation to make simulated results coincide with actual situation. The results show that it can obtain high accuracy results of aircraft dynamic RCS quickly, and have stronger applicability in engineering.